Reduction of traffic-related particulate matter by roadside plants: effect of traffic pressure and sampling height

He, Chen; Qiu, Kaiyang; Pott, Richard

doi:10.1080/15226514.2019.1652565

Cited by 22 publications

(12 citation statements)

References 86 publications

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“…Nonetheless, the content of various pollutants in fruits from trees grown near urban and/or industrial areas might exceed safety limits [11,19,23,36]. The most important source of pollution for fruits seems to be airborne PM, emitted e.g., from road sources [12,29,38,39]. In the present study, apples and plums fruits accumulated considerable amounts of PM.…”

Section: Pm Accumulation By Apples and Plums Is Not Affected By Road Type And Distance From The Roadmentioning

confidence: 47%

“…In the present study, three roads with varying levels of traffic (Tables 1 and 4) were expected to be the main source of PM in examined orchards. It has previously been shown that road transport sources, both exhaust and non-exhaust, account for significant PM emissions [11,28,[30][31][32]43] and may be the reason for pollution accumulation in edible plants [29,38,39]. Road PM emission is increased by the number and size of vehicles [32,[44][45][46], average speeds and sudden changes in speed [44,46,47], and is higher in spring and summer than in winter, and higher during the week than at weekends [28].…”

Section: Pm Accumulation By Apples and Plums Is Not Affected By Road Type And Distance From The Roadmentioning

confidence: 99%

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Particulate Matter Accumulation on Apples and Plums: Roads Do Not Represent the Greatest Threat

et al. 2020

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Particulate matter (PM) is a mixture of solid and liquid substances of organic and inorganic character suspended in air. Plants are used as biological filters of air. However, PM can be deposited on their edible parts, with a negative effect on people’s health. The aim of this study was to document the PM accumulation on apples and plums harvested from orchards located alongside roads with differing amounts of traffic. Plums accumulated more PM than apples. The deposition of PM on apples increased during fruit development and was highest at harvest. The impact of road type, traffic intensity, and distance from the road on PM accumulation on fruit was small. The least PM was adsorbed by apples harvested from an orchard located close to a road with the highest traffic, while in the case of plums, no effect of the road on PM deposition was recorded. The amount of PM accumulated on fruits depended on the species (fruit morphology, harvest period), activities undertaken in the orchard (early pruning exposes fruits to PM, ecological preparations increase fruit viscosity), and sources of pollution other than the roads located close to the orchard. Washing fruits with water removed half of the accumulated PM.

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Section: Pm Accumulation By Apples and Plums Is Not Affected By Road Type And Distance From The Roadmentioning

confidence: 47%

Section: Pm Accumulation By Apples and Plums Is Not Affected By Road Type And Distance From The Roadmentioning

confidence: 99%

Particulate Matter Accumulation on Apples and Plums: Roads Do Not Represent the Greatest Threat

et al. 2020

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“…Values at the intersection of Bigge St and Scott St were generally around an order of magnitude greater than background, consistent with more severe pollution caused by stopstart traffic [37][38][39]. There were few similarities between the 2 time-series, suggesting that the air quality at the roadside was mainly influenced by local pollution, from motor vehicles; as has been found in cities in other countries [40][41][42][43]. Roadside values were elevated well above the Australian recommended safe limits (8 μg m -3 annual average or 25 μg m -3 https://doi.org/10.1371/journal.pone.0231778.g006…”

Section: Networked Sensors In Western Sydneymentioning

confidence: 62%

Traffic exhaust to wildfires: PM2.5 measurements with fixed and portable, low-cost LoRaWAN-connected sensors

et al. 2020

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Air pollution with PM 2.5 (particulate matter smaller than 2.5 micro-metres in diameter) is a major health hazard in many cities worldwide, but since measuring instruments have traditionally been expensive, monitoring sites are rare and generally show only background concentrations. With the advent of low-cost, wirelessly connected sensors, air quality measurements are increasingly being made in places where many people spend time and pollution is much worse: on streets near traffic. In the interests of enabling members of the public to measure the air that they breathe, we took an open-source approach to designing a device for measuring PM 2.5. Parts are relatively cheap, but of good quality and can be easily found in electronics or hardware stores, or on-line. Software is open source and the free LoRaWAN-based "The Things Network" the platform. A number of low-cost sensors we tested had problems, but those selected performed well when co-located with referencequality instruments. A network of the devices was deployed in an urban centre, yielding valuable data for an extended time. Concentrations of PM 2.5 at street level were often ten times worse than at air quality stations. The devices and network offer the opportunity for measurements in locations that concern the public.

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“…It is possible that lower-growing plants are more susceptible to trapping particles derived from splashed soil than is the case for trees (Saebø et al, 2012). For Hedera helix, collected from different heights on a living wall in Hanover, there was a high degree of variability of the same sizes of PM on leaf surfaces (He et al, 2020). Large PM (diameter > 10 µm) decreased substantially with increasing height, from 0.5 m to over 2 m; however, for coarse (2.5-10 µm) and ne particles (1-2.5 µm), the variations were slight.…”

Section: Differences In Leaf-deposited Particles Between Plant Speciesmentioning

confidence: 96%

“…As one of the most important aspects of such efforts, urban vegetation plays a crucial role in optimizing the urban environment by regulating the microclimate, reducing noise and mitigating particulate matter (PM) pollution (Baldauf, 2017). The bene ts of vegetation have been demonstrated studies using model simulations (Gromke and Ruck, 2009;Selmi et al, 2016), wind tunnels (Gromke and Ruck, 2009;Wang et al, 2019) and eld experiments (He et al, 2020;Shao et al, 2019;Yan et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

Pollution monitoring using the leaf-deposited particulates and magnetism of the leaves of 23 plant species in a semi-arid city, Northwest China

Chen

Xia

Wang

et al. 2022

Environ Sci Pollut Res

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We conducted a study of the leaf-deposited particles and magnetism of plant leaves in different functional areas (tra c areas, parks and residential areas) in Lanzhou, China. The saturation isothermal remanence (SIRM) of the washed and unwashed leaves of 23 plant species (including evergreen shrubs, deciduous shrubs, deciduous liana species and deciduous trees) at three sampling heights (0.5 m, 1.5 m and 2.5 m) was measured. In addition, the mass of the leaf-deposited particles was measured using the elution-ltration method and the leaf morphological characteristics were determined by scanning electronic microscope (SEM) analysis. The results revealed signi cant differences in particles retention capacity among the 23 plant species, with evergreen shrub species at the heights of 0.5 m and 1.5 m having higher particles concentrations. Buxus sinica, Buxus megistophylla, Prunus cerasifera and Ligustrum×vicaryi were the most effective plant species for accumulating particles. The SEM results showed that leaves with a relatively complex adaxial surface (such as deep grooves and protrusions)were more effective at accumulating particles. The SIRM of washed leaves, unwashed leaves and leafdeposited particles were signi cantly higher in tra c areas than in parks and residential areas. In addition, signi cant correlations were found between SIRM of unwashed leaves and leaf-deposited particles and the mass of leaf-deposited particles, and therefore the leaf magnetic properties effectively re ect levels of PM pollution under different environmental conditions. Overall, our results provide a valuable reference for the selection of plant species with high particle retention capacity that suitable for urban greening and pollution mitigation.

show abstract

Reduction of traffic-related particulate matter by roadside plants: effect of traffic pressure and sampling height

Cited by 22 publications

References 86 publications

Particulate Matter Accumulation on Apples and Plums: Roads Do Not Represent the Greatest Threat

Particulate Matter Accumulation on Apples and Plums: Roads Do Not Represent the Greatest Threat

Traffic exhaust to wildfires: PM2.5 measurements with fixed and portable, low-cost LoRaWAN-connected sensors

Pollution monitoring using the leaf-deposited particulates and magnetism of the leaves of 23 plant species in a semi-arid city, Northwest China

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